package com.dianru.analysis.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class HttpRequest {

    public static void main(String[] args) throws UnsupportedEncodingException {

    	String url = "https://itunes.apple.com/cn/customer-reviews/id412573425";
    	String param = "displayable-kind=11&appVersion=current&sort-key=1";
    	String result = sendGet(url, param);
    	
    	System.out.println();
    	System.out.println(result);
    }

    /**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     * @throws UnsupportedEncodingException 
     */
    public static String sendGet(String url, String param) throws UnsupportedEncodingException {
    	
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            
            // 设置通用的请求属性
            connection.setRequestProperty("Content-Type", "text/html; charset=utf-8");
            connection.setRequestProperty("X-Apple-Store-Front", "143465-19,24 ab:SKn801s1 t:native");
            connection.setRequestProperty("Accept", "*/*");
            connection.setRequestProperty("Accept-Encoding", "gzip, deflate");
            connection.setRequestProperty("X-Dsid", "1818685961");
            connection.setRequestProperty("Cookie", "mz_at0-1818685961=AwQAAAFlAAER1QAAAABU78Pua3iHefiCizMxOc7H/hPHI0dNKXI=; xp_ci=3z3RgmMOzpXz56pz8tqzVFd6IDpt; s_vi=[CS]v1|2A492591850112B8-4000014CA00026F5[CE]; Pod=44; itspod=44; xt-b-ts-1818685961=1416990745628; ns-mzf-inst=179-12-80-157-87-8126-442403-44-st13; wosid-lite=mrm6uhg5uXyVLmw46o0ZHM; X-Dsid=1818685961; mz_at_ssl-1818685961=AwUAAAFlAAER1QAAAABU4VTDUZPT6q3D+j18JIfq2+DYlokGYvA=");
            connection.setRequestProperty("Connection", "keep-alive");
            connection.setRequestProperty("User-Agent","AppStore/2.0 iOS/7.1.1 model/iPhone5,4 build/11D201 (6; dt:101)");
            
            // 建立实际的连接
            connection.connect();
            
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
       
        //String ios = new String(result.getBytes("GB2312"),"UTF-8");  
        //String ios = new String(result.getBytes("ISO-8859-1"),"GBK");
        return result;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }
}